中文摘要：

利用傅里叶变换图像处理技术测量阔叶材纤维细胞尺寸。把每一个纤维细胞都用其中心的一个长九个像素点，宽两个像素点的线段点图（LCDM）来表示，进行傅里叶变换（FFT），其能量光谱图（PSP）在水平和垂直方向上的频率分布，除零值以外的最大值，即为细胞径向、弦向直径。实验结果表明，该方法与光学显微镜、图像处理软件的结果基本相同，说明该方法也适用于阔叶材纤维细胞尺寸的测定，扩大了其应用领域，为木材的微观分析提供新方法和新的研究方向。

英文摘要：

Fourier transform image-processing technology was applied to measuring the fiber size of hardwood. In this method, each cell was mapped by the center point on the cell in the transverse section with extending up and down by four pixels （ninepixel length in total） and by two pixels in width, and thereafter line convoluted dot map （LCDM） was obtained. Through Fourier transform, the frequency distribution of power spectrum pattern from both horizontal and vertical directions was obtained and the cell diameter in radial and tangential direction was known from the maximum value except 0 in the distribution. The result indicates that there is no significant difference from that by optical microscope or image-processing software. It suggests that the method can be applied to the cell measurement and expand the Fourier transform application domain. This method provides the new research direction for the microscopic analysis and cell identification, and also provides a theoretical basis for the establishment of the mathematical model to identify cell geometric parameter.